A new report says “vital” paperwork relating to the bridge were destroyed by officials despite knowing questions were being asked about its procurement
As part of their planning consent, Westminster and Lambeth councils sought guarantees that the City Hall would underwrite the the bridge’s maintenance costs should the trust building it be unable to meet their obligations.
The bridge, which is backed by actress Joanna Lumley, is due to receive £60m of public funding, including £30m from Transport for London which is chaired by Mayor Boris Johnson.
Planning permission had already been granted by Westminster and Lambeth councils despite objections from some local residents and stakeholders.
London Assembly members have called on the Mayor to ensure taxpayers have free access to the controversial Garden Bridge.